I wanted to share my experience as I found a way to speed up DDO a LOT for a 15$-40$, depending on which USB flash drive you buy.
First of all, you need:
-USB2.0 port on your computer
-USB Flash Drive Hi-Speed of 8gb or more
-a clean copy of DDO recently installed on your computer
Then, you just need to copy your DDO folder directly on the USB Flash Drive, should take like 15-20 min. After that, you just need to enter the DDO folder on your USB drive and open the dndlauncher.exe, which will open DDO.
Don't worry, its normal if its take time to do the check up before you can sign in, it's only the first time. After that it is gonna load the launcher fast.
After you sign in, you should already see a difference in the first character you gonna load in DDO and when you will start moving, it is gonna be better than before by a lot.
I tried it on 2 computers, a laptop and a desktop that were having difficulty to play quest without lagging, and the desktop was lagging A LOT! And after I tried the USB Flash Drive, I didn't get any more lag, and I was able to put it to high graphic
P.S. You need to know that as of know, I tried this with computer having windows xp, Im gonna try with windows 7 soon and see how it does. Will update as soon as I try it.
Hope this help you, and you be nice to have people write in this thread to tell the difference between before and after
Have fun guys and girls!